2 groups of 12 is what
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Yo sup??
a.For this part just draw a triangle with sides 4,8 and 8 inches respectively.
The sides having 8 inches should make equal angle with the base side.
b.One angle is 20
The other two angles be x and y
but x=y because its an isosceles triangle
x+y+20=180
2x=160
x=80
Hope this helps.
Check the picture below
make sure your calculator is in Degree mode, if you need the angle in degrees
make sure your calculator is in Degree mode, if you need the angle in degrees